Yes. The default for ethovision is to save all newly generated data and video files in subfolders in the project folder (you will see the ethovision file and folders with names like data files, media files, etc). In my experience, when you create a new ethovision file, it will automatically save it on your PC, but if you move the whole project folder to your NAS, all new files it generates should automatically stored in the new location.

Thank you!